Attachment for sewing machines



Nov. 20, 1928.

- A. SAWERS ATTACHMENT FOR SEWING MACHINES '7 Sheets-Sheet 1 Filed Dec.24, 1925 Nov. 20, 1928. I 1,692,094

I A. SAWERS ATTACHMENT FOR SEWING MACHINES Filed Dec. 24, 1925 7Sheets-Sheet 2 Nov. 20, 1928.

A. SAWERS ATTACHMENT FOR SEWING MACHINES Filed Dec. 24, 1925Sheets-Sheet 5 Nov. 20, 1928.

A. SAWERS ATTACHMENT FOR SEWING MACHINES Filed Dec. 24,1925 7Sheets-Sheet 4 WWW Nov. 20, 1928.

' A. SAWERS ATTACHMENT FOR SEWING MACHINES '7 Sheets-Sheet 5 Filed Dec.24, 1925 @m VMM Nov. 20, 1928.

A. SAWERS ATTACHMENT FOR SEWING MACHINES Filed Dec, 24, 1925 7Sheets-Sheet 6 Nov. 20, 1928 A. SAWERS ATTACHMENT FOR sswme MACHINES 24,1925 '7 Sheets-Sheet 7 v Filed Dec.

:IIIIiLZTiI Patented Nov. 20, 1928.

UNITED STATES ANDREW SAWERS, F LEEDS, ENGLAND.

ATTACHMENT FOR SEWING MACHTNES.

Application filed December 24, 1925, Serial No. 77,571, and in GreatBritain March 24, 1925.

This invention relates to a new or improved attachment which is capableof being readily applied to an ordinary chain, or to a lock stitchsewing machine. The said attachment is fitted to an ordinary chainstitchmachine for converting it into a basting and edge rubbing machine.W hen an ordinary lock stitch machine is provided withthe saidattachment, it may be used for edge rubbing and stitching as and whendesired, and in this case, the basting operation, which is usuallyaccomplished on a chain stitch machine, can be dispensed with.

Hitherto it has been customary to haste the edges of a garment on achain stitch sewing machine, or by hand, or partly by each method andthen to pass the garment on to a lock stitch machine for the permanentedge stitching operation to be performed. In the said machines it hasonly been possible to perform the basting operation at a limiteddistance from the edge of the garment being sewn.

The machines at present in use are capable of 0111 edge rubbing andbasting straight or slight y curved edges, and they are unable to rounda V or other shaped recess in the collar or lapel of a garment. Thedistance at which they can haste from the edge of a garment is verylimited. I

The object of this invention is to provide an attachment which may bereadily and easily combined with an ordinary chain stitch or lock stitchmachine, and which will be more efiicient than those hitherto in use.

lVhen the said attachment is combined with a chain stitch machine notonly may the operations of edge rubbing and basting be performed, butsuitable means are provided whereby parts of the attachment are movedout of the way to permit of the said V or other shaped recesses beingbasted or any other basting being sewn at any distance from the edge ofthe garment. attachment is combined with a lock stitch machine, then itprovides ameans for rubbing and stitching the edges and V or othershaped recesses of the garment without having been previouslybasted,.and without removing the garment to a separate machine, thusdoing away with the edge basting operation altogether.

Suitable means are provided when relVhen the and when the action of therubbing bars is dispensed with.

The above named objects are attained by mechanism illustrated in theaccompanying drawings, in which Fig. 1 is an isometric view of theattachment;

Fig. 2 a front elevation of the attachment with its various parts intheir working positions;

Fig. 3 a plan of the same; 7

Fig. 4 a front elevation of the attachment with the upper rubbing bar inits raised position;

F ig. 5 aplan of the attachment showing the upper rubbing bar turned ator about a right angle to the lower rubbing bar;

Fig. 6 a back elevation of the attachment showing the various parts intheir workingpositions;

Fig. 7 an elevation of the right hand end of the attachment;'

Fig. 8 an elevation of the same;

Fig, 9 a front elevation of a sewing ma chine of ordinary constructionwith the attachment applied thereto;

Fig. 10 an elevation of the right hand end of same; i

Figs. 11 and 12 are respectively a front and a side elevation of theeccentric employed for imparting motion to the rubbing bars.

Fig. 13 afront elevation of thelever which raises the upper edge rubbingbar;

Fig. 14 an end elevation "of the same; Fig. 15 aplan of the lever shownat Fig.

theleft hand end of Fig. 16 a front elevation of the cam piece adaptedto fit on the lever shown in Fig. 18;

Fig. 17 an end elevation of the same; Figs. 18 and 19 are respectivelyan elevation and a plan of an upper rubbing bar modified so that it isturned out ofits work ing position by pulling it forward instead ofturning it towards the rear of the at tachment; f p Fig. 20 a backelevation of the attachment provided with modified'means'forreciproeating the rubbing bars from the needle bar;

plate 1 are also formed or fixed a pair of longitudinal guides i4 and'5for purposes to be presently described.

In the bearings formed at the'upper endof the projections 2, 2 ismounted transversely a spindle '6 at a suitable distance from the uppersurface of the base plate '1. On one end of the spindle 6 is mounted apendant lever 7 to which is attached, by any convenient means, aconnecting rod 8 provided with a strap 9 formed in two portions andadapted to embrace an eccentric 10, (Figs. 11 and 12) fixed upon the.driving spindle 11 carried in bearings 3, 13*. The eccentric 10'isprovided with a suitable disc 12 in which are a number of grub screws13, 13 for securing it, in position on the driving spindle 11. In somecases it may be found advisable to employ a boss formed on the end ofthe eccentric in place of the said disc, and when this is done theeccentric will require to be provided with a flange. The eccentric strap9 isretained in position on the eccentric 10 by a plate 14 which isarranged to be fitted upon a reduced portion 15 of the eccentric, andthe plate is retained in position by one or more set screws 16.

'On the driving spindle 11 is fixed apulley 17 for imparting arotarfymotion to the said spindle. Motion maybe transmitted to thepulley 17 by any convenient means, as for example,,from a pulley 18,(Figs. 9 and 10) fixed upon the upper horizontal'shaft 19,-

which imparts motion to the needle bar 20 and is mounted in the upperportion of the arm 21 of an ordinary sewing machine,-- through anendless belt 22 which isarranged topass over a pair ofguidesorjockeypulleys23,'24 fixed upon a spindle 25 and carried by a bearing26 formed on a projection 27 fixed by set screws 28, 28 to the base 29of the sewing machine. Motion is imparted from any convenient source tothe spindle l9 'by means of pulley 3,0 which is formed on, or fixedto,the fly wheel 31 of the sewing machine. Or, motion may be transmittedfrom the bottom shaft "32- ofthe sewing machine,-that is, the one thatoperates the feed mechanism,.to a cam.33 fixed thereon, and from thenceto an oscillating pendant arm 34 mountedon the transverse spindle'b.

'Onthe transverse sp'indle'fi'is mounted a double ended lever 35, theupper and lower ends of which are respectively connected to the upperand lower reciprocating edge rubbing bars marked respectively 36 and 37.The said rubbing bars are serrated transversely respectively on theirlower and upper surfaces. 38,39, and they are constructed as follows Theupper edge rubbing bar 36 is made horizontal for a portion of its lengthand is then curved in an upward direction at 40, when it is turnedhorizontally at a right angle 41 and about parallel with the base 1. Onthe upper surface of the horizontal portion 41 is formed a boss 42, andat-lthe top of the said boss,which is of suitable furcated portion 43which forms a guide. The upper edge rubbing bar is loosely mounted bymeans of its boss 42 upon a pendant pin 44 carriedby the enlarged end'45 of the lever or link 46 which is connected to the upper end of thedouble ended lever 35 by a screw 47 The lower edge rubbing bar 37 isarranged to be connected to the lever 35 by a second connecting .leverorlink 48 and a screw 49. Thelever or link 48 is made narrower than thewidth ofthe lower edge rubbing bar 37 and it is arranged to work betweenthe longitudinal guides 4 and 5. When the two edge rubbing bars areintheir closed and working position they are arranged to be aboutparallel,or nearly so,with each other and with the base *1 .of theattachment.

The upper edge rubbing bar 36 is mounted upon its pendant pin '44 insuch a manner as will permit it to be moved out of its-working positionas will be presently described.

The said rubbing bar 36 is retained in its working position by means ofa flat or other spring 50, the rear end of which is fixed by a set screw51 to thehorizontalportion of the angle piece 52 the vertical portion ofwhich angle piece is securedby any convenient means to the verticalbifurcated part 53 which is part of the vertical lug 3 cast or otherwiseformed onor fixed to the base 1. Two pins 55 are also provided on theupper surface of the horizontal portion ofthe angle piece 52 forretainingvthe spring 50 in a working position. I necting lever or link46 is arranged to work in the bifurcation ofthe vertical portion 53which acts-as a guide for the said lever both in its'reciprocating andrising and falling is connected to a boss 58 from the end-ofwhich-projectsan arm '59 in which is fixed apin 60 upon which is'mountedarunner or bowl 61. The lever 57,';boss'58 arm 59 "are preferably formedin 'onepiece and 'length,-is formed a second horizontal bi- Theupper-com r the manner shown at Figs. 13 to 15. The boss 58 and portionsof the lever 56 and arm 59 are mounted loosely upon the driving spindle11. The arm 59 may be arranged at any suitable angle, say, for exampleonly, of about one hundred and fifty degrees to the lever 57. The .bowl61 is adapted to engage with a cam path 62 formed on, or

fixed to, the upper surface of a sliding bar 63 to which the edge guide64 is secured by means of a set screw 65. The edges of the sliding bar63 are inclined outwards and are arranged to work in suitablelongitudinal guides formed on, or fixed to, the base 1 of the machine.

Tothe rear 89 ofthe lever 57 is fixed the arm 90 of a cam piece 91. Thecam piece 91 is arranged to be at or about a right angle to its arm andits upper surface 92 is arranged to engage with the under surface of thelever or link 46. The arm 90 is provided with a slot hole 93 throughwhich is arranged to pass a set screw 94, Fig. 1. The end of thesetscrew 94 is arranged to pass into the hole 95 (Fig. 13) provided with ascrew thread.

The outer end,that is, the end nearest the needle,of the edge guide 64is arranged tobe adjustable by forming theportion which actuallycomesinto contact with the work as a separate piece having the form ofthe letter L. The long arm of this L-shaped piece is provided with aslot 66 and secured to the upper surface of the guide. The shorter arm67 of the L-shaped piece is arranged to be pendant and when desired maybe of a greater width than the longer arm.

If desired the slide for the edge guide may take any other form in crosssection, as for instance, instead of being dovetailed it may have itssides perpendicular to its base. In the latter case the longitudinaledges of the edge guide would be vertical instead of being inclined andthe guide would be retained in the slide by a plate secured to the uppersurface of the slide.

On a pin 68,-Figs. 6 and 8,at the rear, and on the upper surface of thebase 1 of the attachment, and parallel therewith, is pivoted anoperating lever 69 which extends from the rear to, and slightly beyond,the front edge of the base. The said lever passes over the sliding bar63 and below the -por tion 41 of the upper rubbing bar 36, and to itsouter and front end is fixed a knob 70 by means of which it is operated.The movement of the operating lever is limited by two recesses 71 and'72 (Fig. 1 formed at a suitable distance apart in the upper surface ofthe base 1 of the attachment, and which taper towards the centre. A pin73 having a curved or tapered lower end 74 is arranged to engage withthese recesses, and it is carried in-a sleeve or socket 75 attached tothe under surface of-the last named lever and near to the front endthereof. ,76 is secured to the upper surface of the A flat springoperating lever 69 by the knob 70, and the free end of the spring isbifurcated at 77 so as to form a pair of arms which fit'into a recess 78 (Fig. 8) formed in the upper end of the pin 73, whereby the pin iscontinually pressed downwards and forms an effioient stop forcontrolling the movement of the said lever. If desired, however, anadditional vertical pin 7 9 may be employed.

At or near the centre of the operating leveris fixed a vertical pinwhich projects above and below the upper and lower surfaces of thelever. The portion 80 (Figs. 6 and 8) of the pin below the lever worksin a cam path 81 formed transversely in, or fixed trans versely to, thesliding bar 63.

' The upper end 82 (Figs. 1, 3 to 6 and 8) of the vertical pin works ina cam path formed in a plate 83 fixed to,or in a projection formedon,the portion 41 of the pivotably mounted upper edge rubbing bar 36.The last named cam path is approximately L shaped and has two portions84 and 85 at or about a right angle to each other and it is employed forswingingor turning the upper edge rubbing bar 36 out of the way, forpurposes to be presently described,-and is so constructed that theoperating lever 69 is moved for a certain'distance,-say into theposition shown at Fig. 4,-before moving the said rubbing bar, On movingthe operating lever 69 from its initial position 86 (Fig. 5), the edgeguide 64 andits sliding bar 63 are moved inwards by the action of thelower end 80 of the pin fixed to the operating lever and the upper edgerubbing bar 36 is slightly lifted,by the inwvard movement of the edgeguide, and the action of the cam piece 62. Simultaneously the upperportion 56 of the lever 57 is low cred, and thus by these two movementsthe portion 56 is clear of the lever 43and the upper rubbing bar is freeto turn upon its pivot, upon the continued movement of the operatinglever 69 to the final position 87 shown in Fig. 5. i

The vertical arm of the angle bracket- 52 is attached to the upper endof the herein-' before named portion 53 and both the vertical arm of thebracket and the portion 53 are bifurcated so as to form a guide in whichworks the rod 46 connecting the upper edge rubbing bar 36 to the doubleended lever 35. The said bifurcation provides for the free reciprocatingand up and down motion of the connecting rod 46 and thehorizontalportion of the said angle piece is arranged above the said rod. .Ifdesired, a spiralspring may be'attached to the base of the attachmentand to the connecting rod in place'of the flat spring 50, or any otherconvenient arrangement may be employed.

By pivoting the operating lever .69 as described and providing it withthe pin which projects both above and below the upper and lower surfacesof the said lever, the pin forms a connection with the sliding bar 63and also with the cam plate 83 which is attached to the upper rubbingbar 36.

On moving the operating lever 69 the upper portion 82 of the pin travelsin the recessed portion 85 of the cam plate 83. Simultaneously with thismovement, by the lower end of the said pin working in the groove 81, thesliding bar 63 is caused to move towards the spindle 6. By the'movementof the sliding bar 63 the cam piece 62 is brought into cont-act with thebowl or runner 61 thereby moving the lever 57 in the direction of arrow88, (Fig. 13). At the same time the cam piece 91 is raised and its uppersurface 92 acts upon the lower surface of the link 46 which iscorrespondingly raised. Simultaneously the portion 56 is lowered untilit is clear of the bifurcation 96 in the horizontal portion 43 at therear of the upper edge rubbing bar 36.

The swinging or turning movement of the upper edge rubbing bar 36 isaccomplished by moving the operating lever 69 which causes the upperportion 82 of the pin attached thereto, to travel in the portion of thecam path in the plate 83, in a direction away from the needle,until itbears against the end thereof. On the continued movement of theoperating lever 69 the portion 82 of the pin bears against the side 65of the portion 85 of the cam path and causes the upper edge rubbing bar36 to be moved into a position at about a right angle to the lower edgerubbing bar 37 as shown at Fig. 5. When this stage of the operation iscomplete, further movement of the operating lever 69 causes the portion82 of the pin to travel freely in the portion 84. of the cam path in theplate 83.

The attachment is fixed to the base 29 in a position so that the edgerubbing bars 36, 37 are in front of the needle 97. The work having beenplaced between the edge rubbing bars the operating lever 69 is returnedto its initial position 86 for bringing the various parts of theattachment into their working positions and motion is imparted to thedriving spindle 11 of the attachment from any of the above named parts,and the eccentric 10 oscillates the pendant lever 7 on the transversespindle 6, thereby oscillating the double ended lever 35 fixed thereon.By this means the necessary reciprocating motion is imparted to the edgerubbing bars 36, 37, whereby the edges of the garment or other work arerubbed out before coming under the needle.

In order that the upper edge rubbing bar 36 shall not move past itscorrect working position when being returned by the 0perating lever 69,a projection 106 (Figs. 3, 6'

and 7) formed on the horizontal bifurcated portion 43 fixed to the boss420i? the upper edge rubbing bar 36. When the said upper rubbing bar hasreached-its correct working position it is prevented from moving furtherby the projection 106 engaging with a stop 107 fixed to the enlarged endas of the connecting rod 46 by a set screw 108, Figs. 6 and'8.

In some instances it may be found more convenient to make the upper edgerubbing bar 36 swing forwards as shownat-Fig. 19 instead of backwards aspreviously described. In this case the cam plate 83 and the upperportion 82 of the pin fixed to the operating lever 69 are dispensedwith, and the upper rubbing bar 'is pulledforwards.

The movement of the upper rubbing bar is, in this case, limited by apendant projection 109 (Figs. 18 and 19), formed on the 1 under surfaceof the horizontal portion 43, which projection engages the upper portion56 of the lever 57 and the portion 56 looks and unlocks the upperrubbing bar exactly as previously described. i

If the attachment is on a lock stitch machine, then the edge maybe sewnat once, thus saving the labour of first basting the garment, thenconveying it to an ordinary sewing machine for the purpose of edge"guide 64 is simultaneously moved out of the way by the same operation.Thus-a garment can be easily turned for the stitching of the corners.After this is done the upper edge rubbing bar 36 and the edge guide 6%may be brought into their initial positions by moving the operatinglever in the reverse direction, and the operation of edge rubbingandedge stitching may be continued.

If the attachment is applied to a chain stitch machine, then theoperations of rubbing and basting may be completed on=the one machine.hen desired theedge stitching may be done on the samemachine and theoperation of basting omittechbut it is preferred to employ a lock stitchmachine for SGWHW )ur )OSGS. l3 turnin the manor edge rubbing bar 36 outthe way and movmg the sliding edge gu1de'64: to one side by the onemovement of the operating lever 69 it is easily'possible to baiste roundthe .corners of the lapel or other portions of a garment withoutremovingit from the machine. I r

The movable upper rubbingbar andsliding edge guide constitute a greatadvantage over machines previously employed, where it was impossible tosew round corners,- as just described,and was therefore necessary toperform the edge rubbing and basting on one machine, and the edgestitching on a second machine, whilst'the basting of the angularportions of the garment ha d frequently to be done by hand. Furthermore,the distance at which basting could be done from the edge of the garmentby edge rubbing and basting machines previously employed was'limited,but with the present invention basting, or stitching, may be performedat any distance from the edge of the garment, the distance only beinglimited by the length of the arm of the sewing machine to which theinvention is applied.

In cases where the attachment is to be used entirely for edge basting,then it may be modified by the upper edge rubbing bar 36 being madeinxone piece instead of having its operating end pivoted. When thisarrangement is employed the cam plate 83 on the upper edge rubbing bar36 is dispensedwith and the operating lever 69 is preferably arranged atthe end of the attachment further from the needle and it is pivoted atthe front of the'attachment. In the rear end of the operating lever 69,which in this case is not so long as previously described,is formed aslot which engages a pin on the inner end of the sliding bar 68, and onthe upper surface of the said lever is formed a cam piece which replacesthe one formed on the sliding bar. cam piece engages a turned down endon the rear 89 of the lever 57, the boss of which is loosely mounted onthe driving spindle 11 of the attachment. 7 The lever 57 is other wisethe same as previously described.

The action of this modified arrangement is similar to that previouslydescribed. On the operating lever being moved to one side, the slidingedge guide is drawn inwards and the turned down end of the lever 57 israised and by the action of the adjustable cam piece 91 the upper edgerubbing bar is lifted from the work.

Although the modified arrangement has been described it is preferred toemploy the attachment with the swinging arm for both edge rubbing andbasting, and edge rubbing and stitching. I I

In some cases the edge rubbing bars may be made adjustable as regardstheir length, that is, the links 46 and 48 may be made in two parts, oneof which is provided with a slot and is adjustably secured to the otherparts by set screws.

When it is inconvenient to impart motion to the driving shaft of theattachment from the upper or lower shaft of the sewing machine, then, bythe following slight modifica- 'tion being made to the attachment it mayThe said receive its motion from the needle bar. The eccentrlc 10eccentric strap 9 and connecting rod 8 are vdispensed with and thedriving shaft 11 is replaced by a spindle 98 (Fig.-

103 carried b the needle bar 20. The short arm of t e said bell cranklever is connected by a link 104 to the pendant lever 7 on thetransverse spindle 6, whereby motion is transmitted from thereciprocating needle bar 20 to the said pendant lever for oscillatingthe said spindle and the double ended lever 35 mounted thereon.

If desired on the upper end of the projection carrying the just namedspindle 98 may be fixed a second pin upon which the said bell cranklever may be mounted instead of being-on the spindle 98, upon whicl maybe placed the lever 57 alone.

What I claim is 1. In a sewing machine for basting and edgerubbing, anattachment comprising a base'having a pair of transverse parallelspindles carried in bearings, one of said spindles constituting thedriving spindle and the other a rock shaft, a double ended lever fixedon the rock shaft, a pendant lever fixed on the rock shaft, an eccentricfixed uponthe driving spindle, an eccentric strap connected to thependant lever for imparting motion to the rock shaft, a pair ofvertically spaced links each jointed at one .of its ends to the doubleended lever, a spring exerting pressure on one of said links, guides forthe links, and a pair of serrated edge rubbing bars'adapted toreciprocate in opposite directions, the lower rubbing bar be ing fixedto the bottom link, and the upper rubbing bar being pivoted to the upperlink, as set forth. 1

2. In an attachment for sewing machines, the combination ofa horizontalbase, a driv ing shaft mounted transversely in bearings above the base,a rock shaft similarly mounted on the base, a pulley fixed upon thedriving shaft, an eccentric fixed to the driv- 7 ing shaft, a doubleended lever fixed upon the rock shaft, a pendant lever on the rock,

shaft, said eccentric and pendant lever being coupled together by astrap and a connecting rod, a pair of horizontal vertically sepa ratedlinks working in guides, and connected, respectively, to one of the endsof the double ended lever, a pair of serrated reciprocating edge rubbingbars, arranged above each other, one rubbing bar being fixed to thelower link and the other rubbing bar being pivoted to the upper link, aboss on the last said link a spring for pressing the upper link, andpivoted bar on to thework, a bi-v furcated horizontal projectionarranged at the upper end on the boss. of the pivoted edge. rubbing bar,.a double ended lever loosely mounted upon the driving spindle, one endof said lever being arranged to pass into the said bifurcation of thehorizontal projection, for locking the upper edge rubbing bar in itsworking position, andmeans for operating the last named double endedlever, as set forth. 3. In an attachment for sewing machines, the meansfor locking. in its working position, releasing, and raising an upperedge rubbing bar, comprising, in combination, a base plate havingbearings and guides thereon, a rock shaft 6, means for imparting motionto the rock shaft, a driving spindle parallel with the said shaft, a

doubleended lever fixed on the rock shaft, an upperand a lowerilinkreciprocating in guides each attached at one end to the double endedlever, a spring for controlling the movement of the upper link, a pairofserrated oppositely reciprocating bars, arranged.

one above the other, one of saidbars being attached to the upper andspring controlled link, and the otherrubbing bar being fixed to thelower link,,a boss; on the upper rub bing bar havingahorizontalabifurcated projectlon, a double ended lever-loosely, mountedupon. the driving sprindle, onearmof the said leverwbeing arranged toenterv the bifurcation of the. said projection for locking purposes, anadjustable cam piece fixed to the.

other. arm of the said lever for raising the upper link, a pendant leverfixed to the sec ond double ended lever, a bowl mounted upon the pendantlever, a cam piece on one end of areciprocating bar working in guides onthe base, a transverse block at the opposite end of the said bar havinga. groove: formed therein, and an operating lever pivoted upon the baseand provided with a pendant pin adapted to work in the groove of thesaid 100? for operating the bar and its cam as set ort Y 4. In anattachment for sewing machines, the combmation with a base, upper andlower edge rubbing bars and a pair of links connected, respectively,with each said bar, of means for moving the upper edge rubbing bar outof its reciprocating position, comprising, in combination an operatinglever pivoted to the said base, a plate fixed horizontally to the saidrubbing bar and having a cam, slot formed therein, a pinlfixed in theoerating lever with its, ends projecting above' and below'its surfaces,the upper end of the,

pin engaging with the said, cam, slot, and a reciprocable bar having agroove receiving thelower end of said pinasset forth.

5. In an attachment for sewing machines,

the combination of a horizontal base, a driving spindle mountedtransversely inb e'arings above the base, a rock shaftmounted, on thebase, a double ended lever fixed on the rock shaft, means for impartingmotion to; the

said rock shaft, a pair of vertically separated links pivotallyconnectedrespectively to the ends of the double endedlever, a spring exertingpressure on one of the said links, a pair of superposed serrated. oppostely mounted on the base, a, double ended lever fixed upon the rockshaft, a pair of vertically separated links attached respectively totheends of said double ended lever, a, pair, of superposed serratedoppositely reciprocating edge rubbing bars, one of which is fixedto;

the lower link and the other of whichis pivotally mounted upon the upperlink, a

spring bearing upon the upper link, means for locking, releasing, rasing and moving the upper rubbing bar into and away from its workingposition, and means adapted to,

be actuated byjthe sewing machine for actuating the shafts, as setforth.

7 .In an attachment for sewing machines of the character described, thecombination of a pair of superposed edge rubbing bars, having oppositelyopposed serrated surfaces,

means for reciprocating said bars adaptedto be operated by a moving partof the sew ng machine, one of said bars comprising two pivotallyconnected sections, and a lever extending transversely of said edgerubbing bars and adapted to adjust the serrated portion of the upperbarv to a position substantially at right angles to the length of saidbar; 1

, ANDREW SAWERS;

